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94 lines
4.1 KiB
Plaintext
94 lines
4.1 KiB
Plaintext
h1. MiddleClass
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Lua OOP classes usually end being:
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* multi-file libraries, too difficult to understand
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* very small libraries, not very powerful
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Middleclass attemps to be a mid-sized library (~120 lines of code, on a single file), with clean, easy to understand code, and yet powerful enough to be used in most cases.
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h1. Documentation
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See the "LÖVE wiki page":http://love2d.org/wiki/MiddleClass for examples & documentation.
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h1. Features
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* ~100 lines of code
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* top-level Object class
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* all methods are virtual
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* instance.class returns the instance's class
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* @Class.name@ returns the class name (a string)
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* @Class.superclass@ returns its super class
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* Subclassing:
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** @class(name)@ creates a subclass of @Object@
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** @class(name, Superclass)@ creates a subclass of the class @SuperClass@
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** @SuperClass:subclass(name)@ also creates a subclass of the class @SuperClass@
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* Instantiation:
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** Classes can define an @initialize@ method for initializing new instances. They can accept an arbitrary number of params.
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** Instances are created by doing @Class:new(params)@ or also @Class(params)@
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** It is recommended to use the @super@ facility inside all defined initializers: @super.initialize(self, params)@.
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* support for Lua metamethods: just define a method called @__tostring@, @__add@, etc. and your instances will be able to use it.
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* Mixins:
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** A very simple mechanism for sharing functionality among a group of classes that are otherwise non-related.
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** Mixins are just simple lua tables with functions inside them.
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** @Class:include(mixin)@ will copy the function definitions of @mixin@ to @class@
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** If @mixin@ contains a function, called @included@, that function will be invoked right after the functions have been copied. It allows for modifying the class more profoundly.
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* The function @instanceOf(class, instance)@ returns @true@ if @instance@ is an instance of the class @Class@
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* The function @subclassOf(Superclass, Class)@ returns @true@ if @Class@ is a subclass of @SuperClass@
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* The function @includes(mixin, Class)@ returns @true@ if @Class@ (or one of its superclasses) includes @mixin@.
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* The @super@ facility, can be used inside a method to call the same method as it's implemented by the superclass: @super.methodName(self, params)@
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Features left out:
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* metaclasses
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* classes are not Objects (instances are)
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h1. Installation using git (recommended)
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The easiest way is creating a clone using git:
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<pre>
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git clone git://github.com/kikito/middleclass.git
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</pre>
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This will create a folder called @middleclass@. You can require it using:
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<pre>
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require 'middleclass.init'
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</pre>
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If you have @?/init.lua@ included in your @package.path@ variable, you can remove the @.init@ part.
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If you ever want to update middleclass, you can use the following commands:
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<pre>
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cd your/path/to/middleclass
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git pull origin master
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</pre>
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Git will automatically update middleclass for you.
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h1. Manual download
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Middleclass can be directly downloaded using "the github downloader":https://github.com/kikito/middleclass/archives/master
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You will not be able to get automatic updates with that method, but your folder size will be smaller.
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As an alternative, you can directly download "middleclass.lua":https://github.com/kikito/middleclass/raw/master/middleclass.lua and "BSD-LICENSE.txt":https://github.com/kikito/middleclass/raw/master/BSD-LICENSE.txt and put them in your project.
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In that case, you will have to require it doing something like this (will vary if you put middleclass.lua inside a folder):
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<pre>
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require 'middleclass'
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</pre>
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(This assumes you have @?.lua@ in your @package.path@, which is the default)
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You will have to put BSD-LICENSE.txt somewhere in your folder, or copy-paste it inside of your own license.txt file.
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h1. middleclass-extras
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This library has a companion lib that adds a lot of interesting functionality to your objects. Give it a look at "middleclass-extras":https://github.com/kikito/middleclass-extras
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If you are looking for @MindState@ (now called @Stateful@), it's over there, too.
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h1. Specs
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You may find the specs for this library in "middleclass-specs":https://github.com/kikito/middleclass-specs
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